Question

write all possible subset of the following

A={1,2,3,4,5,6}

B={x,y,z}

C={a,e,i,o,u}

D={10,20,30,40,50}

Answer 1

T={1,2,x,e,20}.

may be help you

Answer 2

subsets of B={ },{x},{y},{z},{x,y},{x,z},{y,z},B
here, null set is subset of all subsets
every set of a subset of itself
formula for number of subsets=2^n, where is number of elements

to find all subsets first write the null set then the singleton sets then sets with 2 elements then 3 and so on.
pls solve the others on your own to get a clear idea
if any problem u may ask.